You can easily get 20% off pretty much anything you buy if it’s part of Microsoft’s buyback program.
Here’s how you do it. Goto Live.com and search for anything you want to buy. Sometimes, you will have to enter the competitors product to get the discount. (As you can see above, you get 20% off for HP laptops by searching for Dell Laptops)
I started my search at Live.com and searched for “cheap” along with some product name; I tried a few variations such as “cheap wii” and “